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Can Information Heterogeneity Explain the Exchange Rate Determination Puzzle?

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  • Eric van Wincoop
  • Philippe Bacchetta

Abstract

Empirical evidence shows that macroeconomic fundamentals have little explana-tory power for nominal exchange rates. On the other hand, the recent “microstruc-ture approach to exchange rates” has shown that most exchange rate volatility at short to medium horizons is related to order flows. This suggests that investor het-erogeneity might be key to understanding exchange rate dynamics, in contrast to the common representative agent approach in macroeconomic models of exchange rate determination. To explore this issue, we introduce investor heterogeneity into an otherwise standard monetary model of exchange rate determination. There are two types of heterogeneity: dispersed information about fundamentals and non-fundamentals based heterogeneity (e.g., liquidity traders). We show that in-formation dispersion leads to magnification and endogenous persistence of the im-pact of non-fundamentals trade on the exchange rate, both resulting from rational confusion about the source of exchange rate fluctuations. Higher order expecta-tions, familiar from Keynes’ “beauty contest”, partly contribute to these results. The implications of the model are consistent with the evidence on the relation-ship between exchange rates and fundamentals: (i) fundamentals play little role in explaining exchange rate movements in the short to medium run, (ii) over longer horizons the exchange rate is primarily driven by fundamentals, (iii) exchange rate changes are a weak predictor of future fundamentals

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Bibliographic Info

Paper provided by Econometric Society in its series Econometric Society 2004 North American Winter Meetings with number 628.

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Date of creation: 11 Aug 2004
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Handle: RePEc:ecm:nawm04:628

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Keywords: exchange rates; investor heterogeneity; higher order beliefs;

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